A 480-V, 60-Hz, Y-connected synchronous generator, having the synchronous reactance of 1.04 ohm and negligible armature resistance,

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A 480-V, 60-Hz, Y-connected synchronous generator, having the synchronous reactance of 1.04 ohm and negligible armature resistance, is operating alone. The terminal voltage at rated field current at open circuit condition is 480V.

1. Calculate the voltage regulation

If load current is 100A at 0.8 PF lagging
If load current is 100A at 0.8 PF leading
If load current is 100A at unity PF

2. Calculate the real and reactive power delivered in each case.

3. State and explain whether the voltage regulation will improve or not if the load current is decreased to 50 A from 100 A at 0.8 PF lagging.

Related Book For answer-question

Electric Machinery

ISBN: 978-0071230100

6th Edition

Authors: Charles Kingsley, Jr, Stephen D. Umans

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Posted Date: Apr 21, 2020 06:28 AM

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A 480-V, 60-Hz, Y-connected synchronous generator, having the synchronous reactance of 1.04 ohm and negligible armature resistance,

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Given data V480v I a 100A x s 104ohm 1 i If load current is 100A at 08 PF lagging the formula for la... View the full answer

Electric Machinery

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